I don't know what the terminology is. "Shifting up" or "Upshifting" means going to a harder gear. i.e. less pedal RPMs for a given wheel speed. "Shifting down" or "Down shifting" means the opposite.

Shifting to turn the crank slower is going to a smaller cog on the rear, or going to a larger ring on the front. That is "upshifting" or "shifting up". Going to a faster, less resistant gear, smaller ring up front or larger cog in the rear is "downshifting", or "shifting down."

Think of driving a car, going to higher or lower engine RPMs.